Leupold® BX-1 Yosemite 10x30 Binoculars compact size fits perfectly in smaller hands, making them ideal for children or a smaller-stature person. Legendary fully multicoated optics ensure optimal brightness, resolution, contrast and color fidelity. The compact, porro-prism design is well-suited for low-light conditions. BaK-4 prisms produce crystal-clear imaging. Twist-up eyecups let you adjust the eye-relief distance and comfortably wear glasses while viewing. Filled with nitrogen to maintain its 100% waterproof integrity. Protective rubber-armor coating. Ergonomic, industrial design. Includes a case, neoprene neck strap, eyepiece covers and tethered objective lens covers. Covered by manufacturer's limited-lifetime warranty. Smooth focusing Twist up eyecups L-Coat BAK4 prisms Close focus distance of 10 feet Diopter focus Narrow interpupillary distance Porro prism design Fully multi coated lens system